Which fixed wing aircraft is equipped with 30mm, 105mm, and small diameter bombs?

The AC-130J Ghost Rider is the correct answer as it is specifically designed for close air support and can carry a versatile array of munitions, including 30mm cannon rounds, 105mm howitzer shells, and Small Diameter Bombs (SDB). The AC-130J's armament allows it to engage targets effectively in various operational environments, providing precision firepower along with significant payload capabilities.

The aircraft's design incorporates advanced targeting and surveillance systems, enabling it to perform its mission with high accuracy and efficiency. This versatility makes the AC-130J particularly valuable in supporting ground forces with both direct and indirect fire.

In contrast, while the other aircraft listed may possess impressive capabilities, they do not have the same combination of armaments. For instance, the F-16 and the F/A-18 primarily utilize air-to-air or precision strike munitions, focusing on different roles within air combat and ground attack contexts. The B-1B, while a bomber with significant payload capacity, does not utilize the combination of 30mm and 105mm systems within its arsenal. Thus, the unique mix of weaponry on the AC-130J clearly sets it apart as the correct identification for this question.